uu.seUppsala University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Localized crustal deformation along the central North Anatolian Fault Zone revealed by joint inversion of P-receiver functions and P-wave polarizations
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Geophysics. Univ Durham, Dept Earth Sci, Sci Site, Durham DH1 3LE, England.
Istanbul Tech Univ, Fac Mines, Dept Geophys Engn, TR-34469 Istanbul, Turkey.
Univ Bergen, Dept Earth Sci, Allegaten 41, N-5007 Bergen, Norway.
Istanbul Tech Univ, Fac Mines, Dept Geophys Engn, TR-34469 Istanbul, Turkey.
2019 (English)In: Geophysical Journal International, ISSN 0956-540X, E-ISSN 1365-246X, Vol. 217, no 1, p. 682-702Article in journal (Refereed) Published
Abstract [en]

The North Anatolian Fault Zone (NAFZ) is a major plate boundary that separates the Eurasian Plate to the north from the Anatolian Plate to the south and is associated with powerful damaging earthquakes. Despite numerous studies of the crust and upper mantle across the NAFZ, our understanding of the exact mechanisms and distribution of deformation with depth is still limited. Accurate models of the crustal velocity structure are key to assess seismic hazard associated with strike-slip deformation. Here, we address this need by employing a novel method that jointly inverts receiver function waveforms and P-wave polarizations to recover S-wave velocity structure from the surface to the upper mantle. The method is applied to a dense teleseismic data set collected across a segment of the central NAFZ in Turkey. The results provide important new constraints on the sedimentary thickness, depth to basement and Moho discontinuity beneath the region. Our estimates of uppermost sedimentary thickness range from 0 km in some areas (e.g. in the Central Pontides) to 6 km in the Cankiri Basin. Smaller basins are scattered along the NAFZ. A similar pattern is observed for the basement depth, with values exceeding 10 km beneath the Cankiri Basin, where the Moho is shallowest with a depth of similar to 32 km. The Moho reaches a maximum depth of similar to 42 km beneath the Central Pontides. Most other areas have an average Moho depth of 35-38 km. The results reveal clear structural-tectonic relationships in the crust: areas of fundamentally different sedimentary and crustal architecture are bounded by faults and suture zones. The NAFZ appears to accommodate small-scale basin and basement-highs, and acts as a thick-skinned (i.e. full crustal-scale) boundary between laterally displaced crustal blocks to the north and south. Seismicity clusters are centred on areas of low Vp/Vs ratios that may be representative of weak zones.

Place, publisher, year, edition, pages
OXFORD UNIV PRESS , 2019. Vol. 217, no 1, p. 682-702
Keywords [en]
Composition and structure of the continental crust, Joint inversion, Body waves, Crustal imaging
National Category
Geophysics
Identifiers
URN: urn:nbn:se:uu:diva-387225DOI: 10.1093/gji/ggz040ISI: 000465603300041OAI: oai:DiVA.org:uu-387225DiVA, id: diva2:1329871
Available from: 2019-06-25 Created: 2019-06-25 Last updated: 2019-06-25Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full text

Search in DiVA

By author/editor
Schiffer, Christian
By organisation
Geophysics
In the same journal
Geophysical Journal International
Geophysics

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 9 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf